The UU Lalu Lintas Angkutan Jalan app by Onyx Gemstone is a free offline reference guide for Indonesian road laws and regulations. The app contains information about the traffic and transportation laws in Indonesia, as per the Undang Undang Nomor 22 TahunThe app is categorized into 22 chapters, each covering a specific topic related to traffic rules and regulations.

The app is lightweight and easy to use, making it a great tool for anyone who needs quick access to information on Indonesian traffic laws. The app can be used offline, without the need for an internet connection, which makes it convenient for users who are on the go. Overall, the UU Lalu Lintas Angkutan Jalan app is a useful reference guide for anyone who wants to stay up to date with Indonesian traffic laws.